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Construction safety > cranes and derricks april 3 > Flashcards

cranes and derricks april 3 Flashcards

1
Q

What are the most frequently cited citations?

A

550(a)(15)(i) Clearances between power lines & equipment (29)

 550(a)(9) Swing radius at rear of crane barricaded (25)

 550(a)(6) Hoisting machinery – annual inspection (21)

 550(b)(2) Cranes must be in compliance with ANSI B30.5 – 1968 (18)

 550(a)(1) Manufacturer’s specifications (16)

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2
Q

common crane failures

A

1.Side loading the boom 2.Crane out of level 3.Impact loading the boom 4.Recoil

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3
Q

Clearances between power lines & equipment (29)

A

550(a)(15)(i)

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4
Q

Swing radius at rear of crane barricaded (25)

A

550(a)(9)

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5
Q

Hoisting machinery – annual inspection (21)

A

550(a)(6)

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6
Q

Cranes must be in compliance with ANSI B30.5 – 1968 (18)

A

550(b)(2)

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7
Q

Manufacturer’s specifications (16)

A

550(a)(1)

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8
Q

According to The Crane Fatality Study; The Center To Protect Worker Rights, how many crane fatalities are there?

A

502 fatalities

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9
Q

What are the crane fatalities according to the center to protect workers rights?

A

198 Power line contact  58 Boom assembly / dismantling  41 Boom buckling  37 Upset / overturn  36 Rigging Failure  22 Overloading 22 Struck by moving load  21 Related to man baskets  17 Working within swing radius  11 Two-blocking  7 Hoist limitation

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10
Q

power line contact

A

198

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11
Q

boom assembly/dismantling

A

58

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12
Q

boom buckling

A

41

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13
Q

upset/overturn

A

37

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14
Q

rigging failure

A

36

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15
Q

overloading

A

22

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16
Q

struck by moving load

A

22

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17
Q

related to man baskets

A

21

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18
Q

working with swing radius

A

17

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19
Q

Two-blocking

A

11

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20
Q

hoist limitation

A

7

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21
Q

power-line contact

A

39%

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22
Q

Boom assembly/dismantling

A

12%

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23
Q

Boom buckling

A

8%

24
Q

upset / overturn

A

7%

25
Q

rigging failure

A

7%

26
Q

overloading

A

4%

27
Q

struck by moving load

A

4%

28
Q

What are the six crane errors due to operator error.

A
  1. Inexperienced, violent control movements
  2. Boomed out beyond safe working radius
  3. Overload
  4. Overturned while traveling 5.Out of level
  5. Boom collapsed backwards
29
Q

Operator error accounts for what percent of crane accidents?

A

33.1%

30
Q

What are the crane accidents associated with support failure.

A
  1. Ground gave way beneath blocking
  2. Soft footing with crawler cranes
  3. Outrigger blocks fail
31
Q

What percent of crane failures are associated with support failure?

A

31.5%

32
Q

What percent of crane failures are associated with failure to use outriggers?

A

22.6%

33
Q

What percent of crane failures are due to MACHINERY & STRUCTURAL FAILURE?

A

11.2%

34
Q

What are the crane accidents associated with MACHINERY & STRUCTURAL FAILURE?

A
  1. Boom hoist failure
  2. Brake failure
  3. Booms
  4. Outriggers
35
Q

Crane accidents associated with high winds are what percent?

A

1.6%

36
Q

What is the accident associated with high winds and cranes?

A

Wind force sufficient to topple the boom or crane

37
Q

What is the total percent of accidents that are associated with the operator for crane use?

A
  1. OPERATOR ERROR 33.1% 2. SUPPORT FAILURE 31.5%
  2. NO OUTRIGGERS 22.6%
    =87.2
38
Q

operator training requirements

A
  1. Be required to pass a practical operating examination on the specific type of equipment to be operated
  2. Pass a written examination
  3. Demonstrate ability to read, write, comprehend arithmetic skills and load capacity chart usage…..
  4. Demonstrate understanding of ANSI B30.5 and Federal, State, & local requirements
39
Q

What does NCCCO stand for?

A

National Commission for the Certification of Crane Operators (NCCCO)

40
Q

OSHA recognizes ___ as independent verification of meeting training requirements

A

CCO certification

41
Q

Cranes built before the ___ were built more massively than today’s cranes

A

1970’s

42
Q

Operators used to operate by “the seat of the pants” by allowing the rear of the crane to _____.

A

lift off the ground

43
Q

Today’s cranes will likely ____ before they will tip (this could occur on a later lift and at loads below the actual load ratings)

A

fail structurally

44
Q

Spooling of cable on drum should be ____.

A

smooth and even

45
Q

a. Crane operations must comply with manufacturer’s ____.

A

specifications and limitations

46
Q

b. Where manufacturer specs not available, limitations must be based on determinations by an ________.

A

engineer qualified in the field of cranes.

47
Q

c. No modifications allowed without written approval of ____.

A

manufacturer

48
Q

d. ______, recommended operating speeds & special hazard warnings must be conspicuously posted on all equipment.

A

Rated load capacities

49
Q

f. Accessible areas within the swing radius of the rotating superstructure must be ____ to prevent an employee from being struck or crushed.

A

barricaded

50
Q

g. Hand signals prescribed by ___ must be used.

A

ANSI

51
Q

Illustration of ____ must be posted at job site.

A

hand signals

52
Q

i. All operator cab windows must be of ___ and be free of distortion or obstructions.

A

safety glass

53
Q

All crane cabs must have an _______or greater.

A

in-service 5BC fire extinguisher

54
Q

k. All employees must stay clear of all loads being _______.

A

hoisted or suspended

55
Q
  1. General protocol for cranes and derricks.
A

a. Daily inspection by a competent person (operator) prior to use
b. b. Monthly inspection by a competent person (more mechanically oriented)
c. Annual inspection by qualified person or third party
d. All must be written and kept on jobsite

56
Q
  1. Wire rope must meet ANSI safety factors:
A

a. In running ropes, 6 broken wires in 1 lay or 3 broken wires in 1 strand of 1 lay.
b. Wear of 1/3 of the original diameter of outside individual wires.
c. Evidence of any heat damage.
d. Kinking, crushing, bird caging or other distortion of the rope.
e. In standing ropes, more than 2 broken wires in 1 lay beyond end connections or more than 1 broken wire in end connections.
f. Three or more broken wires in one lay in standing ropes

Construction safety (24 decks)

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